A transformer noise and vibration online monitoring system

Abstract

The present invention relates to an online monitoring system for transformer noise and vibration, which includes a transformer signal acquisition module, a data acquisition module, an industrial computer, a wireless communication module, and a remote terminal. The transformer signal acquisition module is concentrated on a box, the data acquisition module and the industrial computer are arranged in the box, the transformer signal acquisition module is connected to the data acquisition module, the data acquisition module is connected to the industrial computer, the industrial computer is connected to the remote terminal through the wireless communication module, and the transformer signal acquisition module includes a voltage / current sensor, a vibration acceleration sensor, a Hall sensor, and an oil chromatography monitoring device. Compared with the prior art, the present invention has the advantages of comprehensive and accurate monitoring and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of online monitoring equipment, and in particular to an online monitoring system for transformer noise and vibration. Background Art

[0002] Transformer is an important part of the power system. It plays an irreplaceable role. Its operating status has a great impact on the safety and economic operation of the power system. In the long-term operation of the transformer, it is impossible to completely avoid failures and accidents caused by various reasons. Therefore, the correct diagnosis and early prediction of faults are more urgent and important. However, transformer fault diagnosis is a very complex problem. Many factors such as transformer capacity, voltage level, insulation performance, working environment, operation history and even products from different manufacturers will affect the diagnosis results.

[0003] At present, the main method for transformer online monitoring is the gas chromatography analysis of transformer oil or the use of a single vibration signal to reflect the deformation of the transformer winding. However, the gas chromatography analysis of transformer oil is mainly used to judge the overheating and discharge faults of the transformer, and cannot reflect mechanical faults, control circuit faults, etc. in a timely manner; and only using a single vibration signal to monitor the fault condition of the transformer will result in certain errors. Summary of the invention

[0004] The purpose of the present invention is to provide a transformer noise and vibration online monitoring system in order to overcome the defects of the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A transformer noise and vibration online monitoring system, comprising:

[0007] Transformer signal acquisition module, used to acquire signals;

[0008] The data acquisition module is used to collect, quantify and encode the signals acquired by the signal acquisition module, and send the encoded data to the industrial computer;

[0009] The industrial computer is used to analyze and process the data encoded by the data acquisition module, and to send the processing results remotely to the remote terminal;

[0010] A wireless communication module is used to provide wireless communication between the industrial computer and the remote terminal;

[0011] Remote terminal, used to receive the processing results sent remotely by the industrial computer;

[0012] The transformer signal acquisition module includes a voltage / current sensor for collecting three-phase voltage and current signals on the high and low voltage sides of the transformer, a vibration acceleration sensor for collecting transformer vibration signals, a noise sensor for collecting transformer noise signals, a Hall sensor for collecting transformer neutral point current signals, and an oil chromatogram monitoring device for collecting temperature, pressure and oil level values ​​when the transformer vibrates.

[0013] Preferably, the transformer signal acquisition module is concentrated on a box, the noise sensor and the vibration acceleration sensor are detachably arranged on the box, and the data acquisition module and the industrial computer are arranged in the box.

[0014] Preferably, the box body is provided with a first bearing groove for accommodating the noise sensor and a second bearing groove for accommodating the vibration acceleration sensor.

[0015] Preferably, the oil chromatography monitoring device is connected to the box through a telescopic spring.

[0016] Preferably, the oil chromatography monitoring device adopts a tubular oil level gauge which is internally provided with a temperature detector, a pressure detector and an oil level detector.

[0017] Preferably, the transformer signal acquisition module further includes an ultrasonic detection unit for detecting abnormal discharge time of the transformer.

[0018] Preferably, the data acquisition module includes a signal amplifier, a signal processor and a data collector, the vibration acceleration sensor and the noise sensor are connected to the signal amplifier, the voltage / current sensor and the Hall sensor are connected to the signal processor, the signal amplifier and the signal processor are respectively connected to the data collector, and the data collector is connected to an industrial computer.

[0019] Preferably, the ultrasonic detection unit and the oil chromatography monitoring device are connected to a data collector.

[0020] Preferably, the box body is provided with a mounting hole and a hook.

[0021] Preferably, the box is provided with a display screen for displaying the collected data, and the display screen is connected to an industrial computer.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1) The transformer signal acquisition module of the present invention utilizes a vibration acceleration sensor, a noise sensor, and an oil chromatography monitoring device to combine the transformer vibration signal with the noise signal, the temperature, pressure, and oil level value of the transformer affected by the vibration, which is conducive to more accurately reflecting the overheating fault and mechanical fault of the transformer;

[0024] 2) The transformer signal acquisition module of the present invention can detect the time of abnormal discharge of the transformer by using the ultrasonic detection unit, which is helpful to timely reflect whether there is a discharge circuit fault in the transformer;

[0025] 3) The present invention uses a voltage / current sensor to detect the three-phase voltage and current signals of A, B, and C on the high and low voltage sides of the transformer, and uses a Hall sensor to record the neutral point current signal of the transformer, which can be used to determine the circuit fault of the transformer;

[0026] 4) The present invention combines a vibration acceleration sensor, a noise sensor, an oil chromatography monitoring device, a voltage / current sensor to detect the transformer, and an ultrasonic detection unit to comprehensively judge the fault condition of the transformer, and the monitoring is comprehensive, reliable, and accurate;

[0027] 5) The present invention integrates the monitoring unit, sensor, and data acquisition module in one box, which can be easily moved to different transformers for monitoring, and has strong practicality;

[0028] 6) The vibration acceleration sensor and the noise sensor can be removed and installed on the box through the bearing slot, and the oil chromatography monitoring device can be flexibly installed in the middle and lower parts of the oil tank wall of the transformer to be measured where the vibration is more prominent, through the telescopic spring, and the oil outlet and oil inlet are reserved respectively. Compared with the fixed monitoring of the prior art, it is convenient for subsequent maintenance and replacement, and the maintenance cost is greatly reduced;

[0029] 7) The box of the present invention has a mounting portion and a hook, which can make the monitoring of the transformer signal acquisition module more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural block diagram of a transformer online monitoring system in an embodiment of the present invention;

[0031] Figure 2 It is a front view of the structure of a transformer signal acquisition module of a transformer online monitoring system in an embodiment of the present invention;

[0032] Figure 3 In the embodiment of the present invention Figure 2 Rear view of

[0033] Figure 4 In the embodiment of the present invention Figure 2 Side view of

[0034] The numbers in the figure show:

[0035] 1. Box, 2. Transformer signal acquisition module, 3. Data acquisition module, 31. Signal amplifier, 32. Signal processor, 33. Data collector, 4. Wireless communication module, 5. Industrial computer, 6. Remote terminal, 7. Ultrasonic detection unit, 8. Oil chromatography monitoring device, 9. Noise sensor, 10. Vibration acceleration sensor, 11. Voltage / current sensor, 12. Hall sensor, 13. Installation part, 14. Installation hole, 15. Hook, 16. Telescopic spring, 17. Antenna, 18. Display screen. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should belong to the scope of protection of the present invention.

[0037] Example

[0038] The present invention relates to an online monitoring system for transformer noise and vibration, comprising a transformer signal acquisition module 2, a data acquisition module 3, a wireless communication module 4, an industrial computer 5, and a remote terminal 6. The transformer signal acquisition module 2 is concentrated on a box 1. The data acquisition module 3 and the industrial computer 5 are arranged in the box 1. The transformer signal acquisition module 2 is connected to the data acquisition module 3, the data acquisition module 3 is connected to the industrial computer 5, and the industrial computer 5 is connected to the remote terminal 6 through the wireless communication module 4.

[0039] like Figure 2 As shown, the transformer signal acquisition module 2 includes an ultrasonic detection unit 7 , an oil chromatography monitoring device 8 , a noise sensor 9 , a vibration acceleration sensor 10 , a voltage / current sensor 11 , and a Hall sensor 12 .

[0040] The ultrasonic detection unit 7 is arranged on both sides of the box body 1. The ultrasonic detection units 7 not arranged on both sides of the box body 1 have different distances from the abnormal discharge. After the ultrasonic detection units 7 on different sides detect the time of abnormal discharge, the records are transmitted to the data acquisition module 3. The detection frequency range of the ultrasonic detection unit 7 is 30kHz to 1MHz.

[0041] Two oil chromatogram monitoring devices 8 are arranged at the bottom of the box body 1. A telescopic spring 16 is arranged at the bottom of the box body 1. One end of the telescopic spring 16 is fixed to the bottom of the box body 1, and the other end is connected to the chromatogram monitoring device 8. The oil outlet and the oil inlet are respectively reserved in the middle and lower parts of the oil tank wall where the transformer is more prominently affected by vibration. Through the telescopic spring 16, one oil chromatogram monitoring device 8 is placed at the oil outlet, and the other oil chromatogram monitoring device 8 is placed at the oil inlet, so that the oil chromatogram monitoring device 8 can monitor the oil condition of the transformer in real time during operation. Preferably, the oil chromatogram monitoring device 8 adopts a tubular oil level gauge, which includes a temperature detector, a pressure detector and an oil level detector arranged inside, and is used to measure the temperature, pressure and oil level value of the transformer at the same time.

[0042] The noise sensor 9 , the voltage / current sensor 11 , and the Hall sensor 12 are arranged on the front side of the housing 1 .

[0043] The noise sensor 9 collects the noise signal of the transformer. A first bearing slot for accommodating the noise sensor 9 is provided on the front of the box 1. The size of the first bearing slot matches the noise sensor 9, so that the noise sensor 9 can be detachably arranged in the box 1. The noise sensor 9 is removed from the first bearing slot, and the noise sensor 9 is distributed around the transformer to collect the noise signal of the transformer.

[0044] The voltage / current sensor 11 collects the three-phase voltage and current signals of A, B, and C on the high and low voltage sides of the transformer, and the Hall sensor 12 collects the neutral point current signal.

[0045] The vibration acceleration sensor 10 is arranged at the front and back of the box 1. The front and back of the box 1 are provided with a second bearing slot for accommodating the vibration acceleration sensor 10. The size of the second bearing slot matches the vibration acceleration sensor 10, so that the vibration acceleration sensor 10 can be detachably arranged in the box 1. The vibration acceleration sensor 10 can be removed from the second bearing slot and adsorbed on the surface of the transformer body to collect the vibration signal of the transformer.

[0046] The signals collected by the monitoring units and sensors of the transformer signal collection module 2 are input into the data collection module 3 .

[0047] The data acquisition module 3 includes a signal amplifier 31, a signal processor 32 and a data collector 33. The vibration acceleration sensor 10 and the noise sensor 9 are connected to the signal amplifier 31. The voltage / current sensor 11 and the Hall sensor 12 are connected to the signal processor 32. The signal amplifier 31 and the signal processor 32 are respectively connected to the data collector 33. The ultrasonic detection unit 7 and the oil chromatography monitoring device 8 are connected to the data collector 33, and the data collector 33 is connected to the industrial computer 5.

[0048] The remote terminal 6 includes a desktop computer, a smart phone, and a tablet computer.

[0049] A power module for power supply is provided inside the box 1. An antenna 17 is provided outside the box 1 for wireless communication between the wireless communication module 4 and the remote terminal 6. A display screen 18 is also provided on the front of the box 1, and the display screen 18 is connected to the industrial computer 5 in the box 1 for displaying the collected data.

[0050] Preferably, a mounting portion 13 is further provided on the top of the box body 1 of the present invention, and a mounting hole 14 is provided on the mounting portion 13. A hook 15 is provided on the back of the box body 1. The box body 1 can be hung to a designated position of the transformer through the mounting hole 14 and the hook 15, which is conducive to stable monitoring when the transformer signal acquisition module 2 is working and is easy to operate.

[0051] When monitoring is carried out, the vibration signal and noise signal are amplified by the signal amplifier and then sent to the data collector. The voltage and current signals of the high and low voltage sides and the neutral point current signal measured by the Hall sensor are processed by the signal processor and then sent to the data collector. The ultrasonic signal monitored by the ultrasonic detection unit and the temperature, pressure and oil level of the transformer monitored by the oil chromatography monitoring device are directly input into the data collector. After the data collector completes data collection, quantification and encoding, it transmits the data to the industrial computer, which analyzes and processes the data. The results of analysis and processing are wirelessly transmitted to the remote terminal for display.

[0052] By using a vibration acceleration sensor, a noise sensor, and an oil chromatography monitoring device, the transformer vibration signal is combined with the noise signal, the temperature, pressure, and oil level value of the transformer affected by the vibration, which is conducive to more accurately reflecting the overheating fault and mechanical fault of the transformer; the ultrasonic detection unit can detect the time of abnormal discharge of the transformer, which is conducive to timely reflecting whether there is a discharge circuit fault in the transformer; the voltage / current sensor is used to detect the three-phase voltage and current signals of A, B, and C on the high and low voltage sides of the transformer, and the Hall sensor is used to record the neutral point current signal of the transformer, which can be used to judge the circuit fault of the transformer. The monitoring parameters of the system of the present invention are comprehensive, which can further improve the accuracy of monitoring.

[0053] Most of the monitoring systems in the prior art are fixed, which cannot achieve flexible monitoring. They are also inconvenient for subsequent repair and replacement, and have high maintenance costs. Compared with the prior art, the system of the present invention can concentrate all acquisition units, sensors, and data acquisition modules on a box, which can be easily moved to different transformers for monitoring. The vibration acceleration sensor and the noise sensor can be disassembled and installed on the box through the bearing slot, and the oil chromatography monitoring device can be flexibly arranged on the middle and lower parts of the oil tank wall of the transformer to be measured where the vibration is more prominent, through the telescopic spring, to reserve the oil outlet and the oil inlet respectively. In addition, the box has a mounting portion and a hook, which can make the monitoring of the transformer signal acquisition module more stable.

[0054] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A transformer noise and vibration online monitoring system, It is characterized in that The system includes: Transformer signal acquisition module, used to acquire signals; The data acquisition module is used to collect, quantify and encode the signals acquired by the signal acquisition module, and send the encoded data to the industrial computer; The industrial computer is used to analyze and process the data encoded by the data acquisition module, and to send the processing results remotely to the remote terminal; A wireless communication module is used to provide wireless communication between the industrial computer and the remote terminal; Remote terminal, used to receive the processing results sent remotely by the industrial computer; The transformer signal acquisition module includes a voltage / current sensor for collecting three-phase voltage and current signals on the high and low voltage sides of the transformer, a vibration acceleration sensor for collecting transformer vibration signals, a noise sensor for collecting transformer noise signals, a Hall sensor for collecting transformer neutral point current signals, and an oil chromatogram monitoring device for collecting temperature, pressure and oil level values ​​when the transformer vibrates; The transformer signal acquisition module is concentrated on a box, the noise sensor and the vibration acceleration sensor are detachably arranged on the box, and the data acquisition module and the industrial computer are arranged in the box; The box body is provided with a first bearing groove for accommodating a noise sensor and a second bearing groove for accommodating a vibration acceleration sensor; the oil chromatography monitoring device is connected to the box body through a telescopic spring.

2. A transformer noise and vibration online monitoring system according to claim 1, It is characterized in that The oil chromatogram monitoring device adopts a tubular oil level gauge which is internally provided with a temperature detector, a pressure detector and an oil level detector.

3. A transformer noise and vibration online monitoring system according to claim 1, It is characterized in that The transformer signal acquisition module also includes an ultrasonic detection unit for detecting abnormal discharge time of the transformer.

4. A transformer noise and vibration online monitoring system according to claim 1, It is characterized in that The data acquisition module includes a signal amplifier, a signal processor and a data collector. The vibration acceleration sensor and the noise sensor are connected to the signal amplifier, the voltage / current sensor and the Hall sensor are connected to the signal processor, the signal amplifier and the signal processor are respectively connected to the data collector, and the data collector is connected to an industrial computer.

5. A transformer noise and vibration online monitoring system according to claim 3, It is characterized in that The ultrasonic detection unit and the oil chromatography monitoring device are connected to a data collector.

6. A transformer noise and vibration online monitoring system according to claim 1, It is characterized in that The box body is provided with a mounting hole and a hook.

7. A transformer noise and vibration online monitoring system according to claim 1, It is characterized in that The box body is provided with a display screen for displaying the collected data, and the display screen is connected to the industrial computer.

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